<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style>
.siblings * {
	display: block;
	border: 2px solid lightgrey;
	color: lightgrey;
	padding: 5px;
	margin: 15px;
}
</style>
<script src="jquery/1.10.2/jquery.min.js">
	
</script>
<script>
	$(document).ready(function() {
		$("h2").next().css({
			"color" : "red",
			"border" : "2px solid red"
		});
	});
</script>
</head>
<body class="siblings">

	<div>
		div (父元素)
		<p>p</p>
		<span>span</span>
		<h2>h2</h2>
		<h3>h3</h3>
		<p>p</p>
	</div>

</body>
</html>